文献类型：期刊文献

中文题名：不同围压作用下的力学和岩石声发射特性数值实验研究

英文题名：Numerical Simulation of Mechanical and Acoustic Emission Characteristics in Rock Compression Under Different Confining Pressures

作者：梅昭蝶[1];胡云进[1,2];包春燕[1]

机构：[1]绍兴文理学院土木工程学院;[2]绍兴文理学院岩石力学与地质灾害实验中心

年份：2017

卷号：37

期号：8

起止页码：14

中文期刊名：绍兴文理学院学报

收录：国家哲学社会科学学术期刊数据库

基金：浙江省高等教育课堂教学改革研究项目(KG2015406)

语种：中文

中文关键词：岩石力学;围压效应;变形特性;声发射

外文关键词：rock mechanics; confining pressure effect; deformation property; acoustic emission

中文摘要：运用岩石破裂分析RFPA2D系统,研究不同围压对岩石材料强度、变形特性、破坏形式的影响规律,进一步对不同围压下岩石破坏的声发射特性进行深入研究.从模拟结果可看出:随着围压的增大,岩石试件变形过程中的延性区间增长;所得到的围压与抗拉强度的关系是非线性曲线,说明使用的数值模拟系统能够反应出岩石复杂的、非线性的破坏过程.同时,通过研究岩石破坏过程中声发射的变化规律发现随着围压的增加,岩石声发射频度最大时刻存在滞后效应,且各阶段的力学行为造成不同阶段岩石内部的结构变化的特征信息.

外文摘要：Using different confining pressures of rock failure analysis system RFPA2 D,the paper explores the influence of confining pressures on the strength,deformation characteristics of rock material,the damage of rock in the form of acoustic emissions under different confining pressures. Furthermore,it explores the destruction of rock with the acoustic emission characteristics. The simulation results show as follows： with the increase of confining pressure, the ductility interval of rock deformation process is prolonged. The relationship between confining pressures and tensile strength constitutes a nonlinear curve which is obtained by numerical simulation test,indicating that the RFPA2 D system can demonstrate the rock＇s complex,nonlinear process of destruction. The study of the variation of acoustic emission in the destructive process of rock illustrates that with the increase of confining pressures,there is a hysteresis effect existing in the maximum time of rock acoustic emission frequency and the mechanical behavior of various stages exhibits the characteristics of inner structural change of rock.